Solved

Windows forms; lock properties in a derivated object

Posted on 2010-09-17
5
509 Views
Last Modified: 2012-05-10
Hello
I work with VS2010.
In my application I hav a Main Form with the button "btn1". From this Mainform I have the deivatied form Form1.
I declerated the btn1 ad protected, becaus I want to modify it in Form1. How can I make some of the proporties of btn1 unchangable in the Form1? (f.ex. the position and the size shouldn't mustn't be changed in Form1)
0
Comment
Question by:ICSAutomation
  • 3
5 Comments
 
LVL 6

Expert Comment

by:ajb2222
ID: 33701911
instead of exposing btn1 - expose only the properties you want to be able to change.

protected string btn1text
{
get { return btn1.text; }
set { btn1.text = value; }
}
 
0
 

Author Comment

by:ICSAutomation
ID: 33702247
And how can i do this with the event handlers?

Actually I'm looking for a way, where I still can use the porperties in the Propertywindow of the VS. Some of the properties are editable and some are not...
Some event I can create and some not...

0
 
LVL 6

Accepted Solution

by:
ajb2222 earned 80 total points
ID: 33702434
to expose an event

public event EventHandler btn1Click
    {
        add { btn1.Click += value; }
        remove { btn1.Click -= value; }
    }
0
 
LVL 6

Expert Comment

by:ajb2222
ID: 33702683
You will see the properties and events on the form  but you can add a category and description to find them easily

[Category("Button1")]
[Description("Text to display on button 1")]
protected string btn1text ...

[Category("Button1")]
[Description("Event for when button 1 is clicked. ")]
public event EventHandler btn1Click...
0
 
LVL 16

Assisted Solution

by:kris_per
kris_per earned 20 total points
ID: 33704908

To make a property readonly in the Properties window:

[ReadOnly(true)]
public int Width
{
    get; set;
}

When this property is seen in the Properties window, it will be readonly. This is ok for our classes where we can add this ReadOnly attribute to a property. For the types which we dont have the code, we can set ReadOnly attribute at runtime as shown in the code below.

I used the below code once...just posting here...see if this is useful for you in some way.



// Make FindButton's Size property readonly in Properties window



PropertyDescriptor pd = TypeDescriptor.GetProperties(FindButton)["Size"];

AttributeCollection attributes = pd.Attributes;

ReadOnlyAttribute readOnlyAttribute = (ReadOnlyAttribute)attributes[typeof(ReadOnlyAttribute)];

FieldInfo isReadOnly = readOnlyAttribute.GetType().GetField("isReadOnly", BindingFlags.NonPublic | BindingFlags.Instance);

isReadOnly.SetValue(readOnlyAttribute, true);

Open in new window

0

Featured Post

Highfive Gives IT Their Time Back

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

This article introduced a TextBox that supports transparent background.   Introduction TextBox is the most widely used control component in GUI design. Most GUI controls do not support transparent background and more or less do not have the…
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
Sending a Secure fax is easy with eFax Corporate (http://www.enterprise.efax.com). First, Just open a new email message.  In the To field, type your recipient's fax number @efaxsend.com. You can even send a secure international fax — just include t…
This video explains how to create simple products associated to Magento configurable product and offers fast way of their generation with Store Manager for Magento tool.

759 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now